水肥耦合对马铃薯干物质生产量的影响 |
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引用本文: | 李文证,尹娟,马国成.水肥耦合对马铃薯干物质生产量的影响[J].节水灌溉,2016(10). |
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作者姓名: | 李文证 尹娟 马国成 |
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作者单位: | 1. 宁夏大学土木与水利工程学院,银川,750021;2. 宁夏大学土木与水利工程学院,银川750021; 旱区现代农业水资源高效利用教育部工程中心,银川750021; 宁夏节水灌溉与水资源调控工程技术研究中心,银川750021 |
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基金项目: | 国家自然科学基金项目(51169020);教育部“长江学者和创新团队发展计划”创新团队项目(IRT 1067);宁夏大学研究生创新项目(GIP2015049)。 |
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摘 要: | 通过大田试验,以灌溉定额X_1、氮肥量X_2、磷肥量X_3、钾肥量X_4为试验因素,选用4因素10水平的均匀设计,研究水肥耦合对马铃薯干物质生产量的影响。通过逐步回归建立干物质生产量与试验因素的回归模型,结果表明:各因素对马铃薯干物质生产量的影响顺序为:X_3X_1X_2X_4;两因素交互作用对马铃薯干物质生产量影响顺序为:X_31X_2X_1X_4X_3X_4X_2X_3X_1X_3;当X_1为1 036.27 m/hm2,X_2为241.05kg/hm~2,X_3为166.18kg/hm~2,X_4为77.60kg/hm~2时马铃薯干物质最优生产量为1.975 488万kg/hm~2。
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关 键 词: | 马铃薯 干物质 水肥耦合 均匀设计 回归模型 |
The Effect of Water and Fertilizer Coupling on Dry-matter Production of Potato |
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Abstract: | Through field experiment ,selecting four experimental factors ,including irrigation norm (X1 ) ,nitrogenous fertilizer (X2 ) , phosphate fertilizer (X3 ) ,and potash fertilizer (X4 ) ,adopting the uniform design of factors with ten levels for each factor ,the effect of water and fertilize coupling on dry-matter production of potato is studied .The regression models between dry-matter pro‐duction and experimental factors are established through stepwise regression .The results show that the order of the effect of each factor on dry-matter production from big to small is X3 ,X1 ,X2 ,X4 ;the order of the interaction effect of two factors on dry-matter production from big to small is X1 X2 ,X1 X4 ,X3 X4 ,X2 X3 ,X1 X3 ;the optimal dry-matter production ,19 754 .88 kg/hm2 ,can be achieved w hen the X1 , X2 , X3 and X4 are 1 036 .27 ,241 .05 ,166 .18 and 77 .60 kg/hm2 ,respectively . |
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Keywords: | potato dry-matter water and fertilizer coupling uniform design regression model |
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